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US 10,096,808 B2Granted
Secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorDae-Kyu Kim
Life of this patent
Estimating the term…
Abstract
A secondary battery is disclosed. In one aspect, the battery includes an electrode assembly, a can accommodating the electrode assembly therein and a cap assembly sealing the can. The cap assembly includes a sub-plate electrically connected to the electrode assembly and a vent having a protruding portion electrically connected to the sub-plate. The vent includes i) a first fracture portion and ii) a second fracture portion formed between the first fracture portion and the protruding portion.
Claims24
A secondary battery, comprising:
- an electrode assembly;
- a can accommodating the electrode assembly therein;
- and
- a cap assembly sealing the can,
- wherein the cap assembly comprises a sub-plate electrically connected to the electrode assembly and a vent having a protruding portion formed on the center thereof and electrically connected to the sub-plate, and
- wherein the vent comprises i) a first fracture portion, ii) a second fracture portion formed between the first fracture portion and the protruding portion and iii) a non-fracture portion formed between and being thicker than the first and second fracture portions, wherein the first and second fracture portions have different thicknesses,
- wherein the first fracture portion is configured to be fractured when an internal pressure of the secondary battery becomes greater than a first fracture pressure, wherein the second fracture portion is configured to be fractured when the internal pressure becomes greater than a second fracture pressure different from the first fracture pressure,
- wherein the second fracture portion is closer to the center of the vent than the first fracture portion, wherein the first and second fracture portions have different widths and are neither directly connected to nor cross each other, wherein the second fracture portion is spaced apart from the protruding portion,
- wherein the second fracture portion has inner and outer ends opposing each other, wherein the outer end is closer to the first fracture portion than the inner end, and wherein the outer end of the second fracture portion is located within a perimeter of the first fracture portion.
6 more elements
A secondary battery, comprising:
- an electrode assembly;
- a can accommodating the electrode assembly therein;
- and
- a cap assembly closing the can,
- wherein the cap assembly comprises a gas vent, and wherein the gas vent comprises at least first and second fracture regions configured to be fractured by a fracture pressure applied thereto and a non-fracture portion formed between and being thicker than the first and second fracture regions,
- wherein the first and second fracture regions are configured to be fractured by different fracture pressures,
- wherein the gas vent has a protruding portion formed on the center thereof, wherein the first fracture region is closer to the center of the gas vent than the second fracture region, wherein the first and second fracture regions have different widths and are neither directly connected to nor cross each other, wherein the second fracture region is spaced apart from the protruding portion,
- wherein the second fracture region has inner and outer ends opposing each other, wherein the outer end is closer to the first fracture region than the inner end, and wherein the outer end of the second fracture region is located within a perimeter of the first fracture region.
5 more elements
A secondary battery, comprising:
- an electrode assembly;
- a can accommodating the electrode assembly therein;
- and
- a cap assembly closing the can,
- wherein the cap assembly comprises i) a first fracture region configured to be fractured when an internal pressure of the secondary battery becomes greater than a first fracture pressure, ii) a second fracture region configured to be fractured when the internal pressure becomes greater than a second fracture pressure different from the first fracture pressure and iii) a non-fracture portion formed between and being thicker than the first and second fracture regions,
- wherein the cap assembly further comprises a gas vent having a protruding portion formed on the center thereof, wherein the first fracture region is closer to the center of the gas vent than the second fracture region, wherein the first and second fracture regions have different widths and are neither directly connected to nor cross each other, wherein the second fracture region is spaced apart from the protruding portion,
- wherein the second fracture region has inner and outer ends opposing each other, wherein the outer end is closer to the first fracture region than the inner end, and wherein the outer end of the second fracture region is located within a perimeter of the first fracture region.
4 more elements
Dependencies are inferred from the claim text.